Difference between revisions of "Talk:Intel graphics"

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m (kernel parameter could allow backlight changes)
m (Striking out an old option that no longer works.)
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''Intel offers no way to adjust these at the driver level. Luckily these can be set with {{ic|xgamma}} and {{ic|xrandr}}.''
 
''Intel offers no way to adjust these at the driver level. Luckily these can be set with {{ic|xgamma}} and {{ic|xrandr}}.''
  
Adding acpi_backlight=vendor to the kernel boot line allows the backlight to be changed on the Intel HD 3000 via xbacklight without root access. Perhaps a note could be added to provide this option.   
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<s>Adding acpi_backlight=vendor to the kernel boot line allows the backlight to be changed on the Intel HD 3000 via xbacklight without root access. Perhaps a note could be added to provide this option.   
[[User:Papabean|papabean]] ([[User talk:Papabean|talk]]) 02:40, 14 January 2013 (UTC)
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[[User:Papabean|papabean]] ([[User talk:Papabean|talk]]) 02:40, 14 January 2013 (UTC)</s>
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acpi_backlight=vendor stopped working a few kernels ago. (No. I did not revert to be certain).
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However, [https://www.archlinux.org/packages/?sort=&repo=Community&q=intel-gpu-tools intel-gpu-tools] in the [[Arch_User_Repository#.5Bcommunity.5D|community]] repository includes the intel_backlight utility which allows one to manually set the backlight level.
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[[User:Papabean|papabean]] ([[User talk:Papabean|talk]]) 04:36, 11 February 2013 (UTC)
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== Best performance options ==
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In my experience (i5 CPU w/ HD4000, Z77 mobo) the best performance can be had with the following options:
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* SNA acceleration method
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* Vertical sync '''enabled'''
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* TearFree option '''enabled'''
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* {{ic|<nowiki>i915.semaphores=1</nowiki>}} kernel option turned on
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Using the [[Repo-ck | ck kernel]] specific to the CPU architecture also seems to make the video performance more consistent, but not necessarily any faster.

Revision as of 04:36, 11 February 2013

Setting gamma and brightness

Intel offers no way to adjust these at the driver level. Luckily these can be set with xgamma and xrandr.

Adding acpi_backlight=vendor to the kernel boot line allows the backlight to be changed on the Intel HD 3000 via xbacklight without root access. Perhaps a note could be added to provide this option. papabean (talk) 02:40, 14 January 2013 (UTC)

acpi_backlight=vendor stopped working a few kernels ago. (No. I did not revert to be certain).

However, intel-gpu-tools in the community repository includes the intel_backlight utility which allows one to manually set the backlight level.

papabean (talk) 04:36, 11 February 2013 (UTC)

Best performance options

In my experience (i5 CPU w/ HD4000, Z77 mobo) the best performance can be had with the following options:

  • SNA acceleration method
  • Vertical sync enabled
  • TearFree option enabled
  • i915.semaphores=1 kernel option turned on

Using the ck kernel specific to the CPU architecture also seems to make the video performance more consistent, but not necessarily any faster.